Abstract
Due to the requirement of magnetic properties of silicon steel sheets, producing high-precision size strips is the main aim of the cold rolling industry. The tapered work roll shifting technique of the six-high cold rolling mill is effective in reducing the difference in transverse thickness of the strip edge, but the effective area is limited, especially for a high crown strip after the hot rolling process. The six-high mill with a small work roll size can produce a strip with higher strength and lower thickness under a smaller rolling load. At the same time, the profile of the strip can be substantially improved. By advancing a well-established analytical method, a series of simulation analyses are conducted to reveal the effectiveness of a small work roll radius for the strip profile in the six-high cold rolling process. Through the analysis of flattening deformation and deflection deformation on the load, the change rule of the strip profile produced by the work roll with a small roll diameter can be obtained. Combined with theoretical analysis and industrial experiments, it can be found that the improvement effect of the small work roll radius on the profile of the silicon strip is as significant.
Highlights
As a functional material commonly found in magnetic cores, producing a flat thin silicon steel strip is imperative to ensure its functionality when being stacked into cores
The cold rolling process has a significant influence on the grain size and texture of non-oriented silicon steel, and affects the iron loss and magnetic properties of a silicon steel sheet
Based on finite element model (FEM) calculation, the transverse flow factor is dependent on yield stress, friction coefficient, reduction ratio, and strip thickness, and it can be calculated by Equation (31)
Summary
As a functional material commonly found in magnetic cores, producing a flat thin silicon steel strip is imperative to ensure its functionality when being stacked into cores. All roll the contour the first andofsecond stands of a six-high tandem linework withroll a 425 mm work above-mentioned contours with noteworthy differences were implemented and reported effective in diameter. In cold rolling mill above tapered work roll contours are used toof improve the edge the strip, but the effect is equipment, high-strength steel strip can be produced using mills equipped more rolls Thewas ability of the better thickness accuracy, and,transformation at the same time, equipment cost relatively tapered work roll to control the strip edge shape under different work roll diameters needs to be low. The ability of the tapered work roll to control the strip edge shape under different analyzed studied It needs has become the most and effective tool It for producing a high-grade silicon work roll and diameters to be analyzed studied.
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